QR Code Scanner in ASP.Net Web Application Using Smart Phone Camera

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I've developed web application using visual studio 2008 and right at this moment I would like to add one more interface which can scan QR code using smart phone camera to retrieve data.

Can anyone help me to give me an idea or sample source to do this?

Thanks in advance.

Posted 11-May-15 5:09am

Alamgir Hossan

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Sergey Alexandrovich Kryukov · Accepted Answer · 2015-05-11T05:45:00

See, for example, this CodeProject article: How to Build a C# Barcode/QR Code Scanner by Using Your USB Camera[^].

You can find a lot more.

You can use WebRTC for sending media from browser. Start here:
http://en.wikipedia.org/wiki/WebRTC[^],
http://www.html5rocks.com/en/tutorials/webrtc/basics[^],
https://developer.mozilla.org/en-US/docs/Web/Guide/API/WebRTC[^],
http://www.w3.org/TR/webrtc[^].

At the time of writing, WebRTC is supported by all major browsers but not Safary and not IE (not surprisingly).
I want to warn you against the "usual" IE work-around: ActiveX embedded in the browser. This is utterly unsafe. For some safety-savvy users, learning that you are doing those dirty tricks with ActiveX can be enough to blacklist your site, for some very good reasons.

—SA

Xiao Ling · Accepted Answer · 2015-05-12T19:53:00

Solution 2

What you need to do is to capture the barcode image on the client side, and send it to the server side. Then decode the barcode on the server side, and send the result back to the Web client. Here is an HTML5 solution for capturing and uploading images using the smartphone camera: Take a Photo and Upload it on Mobile Phones with HTML5[^]

Posted 12-May-15 19:53pm

Xiao Ling

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Alamgir Hossan 28-Jan-16 6:23am

Hi Xiao,
I've tried using your suggestion, but reader can't decode the QR Image. I would like to mention here that I'm trying to read QR code from ID card after capturing the image from that card. Is there any other alternative way to scan the QR code?

Thanks,

Alamgir

Xiao Ling 1-Feb-16 1:31am

I have no idea why your reader couldn't decode the QR image. You can try the sample - Read Barcode in ASP.NET Web App: http://www.dynamsoft.com/Downloads/Dynamic-Barcode-Reader-Sample-Download.aspx?SampleID=79